2- alkoxy-l,4-pentadien-3-one

Nazarov reactions also proceeded well in the presence of Sc(OTf)3 (Scheme 12.9). Compared with the reaction of 2-alkoxy-l,4-pentadien-3-one, Sc(OTf)3-catalyzed... 

Catalytic, enantioselective Nazarov reaction of 2-alkoxy-l,4-pentadien-3-one in the presence of 20mol% of the chiral Sc(OTf)3-pybox complex was reported (53%, 61% ee) [142]. Later, high yields and enantioselectivities were obtained... 

Liang G, Gradl SN, Trauner D. Efficient Nazarov cycliza-tions of 2-alkoxy-l,4-pentadien-3-ones. Org. Lett. 2003 5 4931 934. 

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